18810987

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{313}}^1$

素因数の和:419

約数の個数: 32

約数和(自身を含む): 28697088

約数和(自身を除く): 9886101

約数列:

[1, 3, 13, 23, 39, 67, 69, 201, 299, 313, 871, 897, 939, 1541, 2613, 4069, 4623, 7199, 12207, 20033, 20971, 21597, 60099, 62913, 93587, 272623, 280761, 482333, 817869, 1446999, 6270329, 18810987]

約数ペア:

[(1, 18810987), (3, 6270329), (13, 1446999), (23, 817869), (39, 482333), (67, 280761), (69, 272623), (201, 93587), (299, 62913), (313, 60099), (871, 21597), (897, 20971), (939, 20033), (1541, 12207), (2613, 7199), (4069, 4623)]